Today, I finally got my yearbook for senior year in high school. I started what everyone does, which is count how many times I appear in the yearbook. I stopped when I found a prominent photo of me, picking my nose in class. FML

I dunno about the OP's school, but random teachers/students at mine go around with cameras taking random pictures without anyone noticing. I've seen quite a few pictures of myself in yearbooks, when I didnt even know I was being photographed.
Oh, and, according to some magazine I have; people who pick their nose regularly have better nasal health. :D Yay for clean nostrils! ^_^